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Unique Observations | Aggregate Functions
Introduction to pandas [track]
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Зміст курсу

Introduction to pandas [track]

Introduction to pandas [track]

1. Basics
2. Reading and Exploring Data
3. Accessing DataFrame Values
4. Aggregate Functions

bookUnique Observations

You can get unique values of particular column by applying the .unique() method. Note, that this is Series method, so it works only for one column of DataFrame. For example, you can get all the cars' fuel types.

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# Importing library import pandas as pd # Reading csv file df = pd.read_csv('https://codefinity-content-media.s3.eu-west-1.amazonaws.com/67798cef-5e7c-4fbc-af7d-ae96b4443c0a/audi.csv') # Unique fuel types print(df.fuelType.unique())
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Also you can get the total number of unique values within specific column by applying .nunique() method to the column.

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# Importing library import pandas as pd # Reading csv file df = pd.read_csv('https://codefinity-content-media.s3.eu-west-1.amazonaws.com/67798cef-5e7c-4fbc-af7d-ae96b4443c0a/audi.csv') # Number of unique engine sizes print(df.engineSize.nunique())
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